From: Hansang Bae (hbae@xxxxxxxxxx)
Date: Sat Mar 02 2002 - 01:03:31 GMT-3
>>From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
>>Michael Jia
>>Sent: Friday, March 01, 2002 4:45 PM
>>To: Ccielab@Groupstudy. Com
>>Subject: ISDN BRI back to back
>>
>>
>>Hi,
>>
>>Is anyone know if it is possible to connect ISDN BRI back to back without a
>>switch?
>>
>>The following link seems to hint it is possible.
>>http://www.cisco.com/warp/public/793/access_dial/8.html
>>
>>Also, I was told "isdn net" can make a BRI act as the network side.
>>What is it mean?
>>
>>Do we have to buy a ISDN switch simulator?
From comp.dcom.sys.cisco's FAQ:
From: Question 101
Date: 02 February 2002
Subject: Sample config of using VIC BRI interfaces as an ISDN switch.
Answer by: "John Paul Morrison" <johnpaulmorrison@Hotmail.com>
Enter this under stupid router tricks (it's got to be more expensive than an
ISDN emulator, but not if you've got the parts lying around).
Switch: Cisco 2600 or 3600 with NM-2V and VIC-2BRI-S/T-TE (NT should work
too), IOS 12.1.5T9 R1, R2: Cisco with ISDN BRI S/T interface. IOS 12.x
R1----S/T crossover cable----Switch----S/T crossover----R2
These configs let you do ISDN BRI dialup between two routers,
using a third router as an ISDN switch. Call setup is flakey but otherwise
it seems to work once the call is up.
Switch config, for ISDN dial (and X.25 over ISDN D-channel thrown in too)
!
isdn switch-type basic-net3
x25 routing
!
interface Loopback0
ip address 10.0.0.1 255.255.255.255 ! whatever
!
interface BRI1/0
description to R1
no ip address
isdn switch-type basic-net3
isdn overlap-receiving
isdn protocol-emulate network
isdn layer1-emulate network
isdn incoming-voice voice
isdn x25 dchannel
isdn skipsend-idverify
!
! Basic X.25 over D channel, so you can run pad commands
! For always on, see the Cisco docs
!
interface BRI1/0:0
no ip address
ip mtu 1514
no ip mroute-cache
x25 address 5552000
clns mtu 1514
!
interface BRI1/1
description to R2
no ip address
isdn switch-type basic-net3
isdn protocol-emulate network
isdn layer1-emulate network
isdn incoming-voice voice
isdn skipsend-idverify
!
interface BRI1/1:0
no ip address
ip mtu 1514
no ip mroute-cache
x25 address 5551000
clns mtu 1514
!
x25 route 5551111 interface BRI1/1:0
x25 route 5552222 interface BRI1/0:0
!
voice-port 1/0/0
!
voice-port 1/0/1
!
dial-peer voice 1 pots
incoming called-number 6045551111
destination-pattern 6045552222
direct-inward-dial
port 1/0/0
!
dial-peer voice 2 pots
incoming called-number 6045552222
destination-pattern 6045551111
direct-inward-dial
port 1/0/1
!
dial-peer voice 10 voip
destination-pattern 6045552222
session target ipv4:10.0.0.1
codec clear-channel
!
dial-peer voice 20 voip
destination-pattern 6045551111
session target ipv4:10.0.0.1
codec clear-channel
!
R1, R2 config (just reverse the 5551111/5552222 and 1.1.1.1/1.1.1.2)
!
isdn switch-type basic-net3
!
interface BRI0/0
ip address 1.1.1.1 255.255.255.0
encapsulation ppp
dialer string 6045552222 class DOV
dialer-group 1
isdn switch-type basic-net3
isdn incoming-voice data
isdn calling-number 6045551111
isdn x25 dchannel
!
interface BRI0/0:0
no ip address
ip mtu 1514
no ip mroute-cache
x25 address 5551111
!
map-class dialer DOV
dialer voice-call
dialer-list 1 protocol ip permit
!
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